18340764547 has 8 divisors (see below), whose sum is σ = 20971282016. Its totient is φ = 15712849152.

The previous prime is 18340764529. The next prime is 18340764557. The reversal of 18340764547 is 74546704381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18340764547 - 2¹¹ = 18340762499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18340764547.

It is not an unprimeable number, because it can be changed into a prime (18340764527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635388 + ... + 663625.

It is an arithmetic number, because the mean of its divisors is an integer number (2621410252).

Almost surely, 2^18340764547 is an apocalyptic number.

18340764547 is a deficient number, since it is larger than the sum of its proper divisors (2630517469).

18340764547 is a wasteful number, since it uses less digits than its factorization.

18340764547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301037.

The product of its (nonzero) digits is 2257920, while the sum is 49.

The spelling of 18340764547 in words is "eighteen billion, three hundred forty million, seven hundred sixty-four thousand, five hundred forty-seven".